215633345869 has 2 divisors, whose sum is σ = 215633345870. Its totient is φ = 215633345868.

The previous prime is 215633345861. The next prime is 215633345881. The reversal of 215633345869 is 968543336512.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 205402023369 + 10231322500 = 453213^2 + 101150^2 .

It is a cyclic number.

It is not a de Polignac number, because 215633345869 - 2³ = 215633345861 is a prime.

It is a super-2 number, since 2×215633345869² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (215633345861) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 107816672934 + 107816672935.

It is an arithmetic number, because the mean of its divisors is an integer number (107816672935).

Almost surely, 2^215633345869 is an apocalyptic number.

It is an amenable number.

215633345869 is a deficient number, since it is larger than the sum of its proper divisors (1).

215633345869 is an equidigital number, since it uses as much as digits as its factorization.

215633345869 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 13996800, while the sum is 55.

The spelling of 215633345869 in words is "two hundred fifteen billion, six hundred thirty-three million, three hundred forty-five thousand, eight hundred sixty-nine".